Re: machine monitoring packages
Am Freitag, 14. Februar 2003 12:47 schrieb Thorsten Giese: Hello there. I have followed the recent discussion with all the flavours of the different tools. A question came to my mind immediatly: What is the difference between nagios and opennms? A second one: Can one of the tools also cope with sylog information? I have to set up a monitoring system on a university for applied siences in Germany this summer and any help would be greatly appreciated. -- Thank you Thorsten Giese Am Donnerstag, 13. Februar 2003 15:59 schrieb gabe: I would like to know what ppl think is the best package for monitor servers, at my last work place they were installing mon. In my new job they use Nagios, which I'm not to sure about due to the fact that installation / configuration goes wrong. Most importantly there's no deb package for Nagios which makes me not wanna use it in the first place. Any comments or thoughts welcomed -- Gabriel Granger +-+ | .~. | | /V\ L I N U X - Debian| | // \\The force is strong in this one | | /( )\ | | ^^-^^ | +-+ -- -- Viele Grüße Thorsten Giese -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
Hello, I believe there is a need for good monitoring tool, and none of existing tools qualify. As it stands now, I am using mix of different tools, quite similiar to each other... ie netsaint, mrtg, smokeping and monit. And add to that syslog with syslog monitoring tools, add ipsec for logging to single machine... It's a nightmare! And they still won't provide all the features i need ( i.e. - mrtg graphs are nice.. but design behind whole mrtg/rrdtool makes them useless in many situations - for example, try comparing trends in two julys from different years.. you can't, can you.. ) The task here is fairly simple, why do I need to set up so many different tools? If anyone decides to start writing monitoring tool, I'd be happy to join the team. -- Dariush Pietrzak, Who are we helping? - the girl. - Typical. Key fingerprint = 40D0 9FFB 9939 7320 8294 05E0 BCC7 02C4 75CC 50D9 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
Don't know all the tools u are talking about, but maybe BigBrother (http://bb4.com/) is what u are looking for? Philipp Hetzner Dariush Pietrzak wrote: Hello, I believe there is a need for good monitoring tool, and none of existing tools qualify. As it stands now, I am using mix of different tools, quite similiar to each other... ie netsaint, mrtg, smokeping and monit. And add to that syslog with syslog monitoring tools, add ipsec for logging to single machine... It's a nightmare! And they still won't provide all the features i need ( i.e. - mrtg graphs are nice.. but design behind whole mrtg/rrdtool makes them useless in many situations - for example, try comparing trends in two julys from different years.. you can't, can you.. ) The task here is fairly simple, why do I need to set up so many different tools? If anyone decides to start writing monitoring tool, I'd be happy to join the team. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
Don't know all the tools u are talking about, but maybe BigBrother (http://bb4.com/) is what u are looking for? Ehm, netsaint,nagios seems way more mature. And I don't intend to replace one of those tools. I want one tool for monitoring. Or maybe two ( monit needs to run as root, wouldn't be to wise to run all monitoring this way ). Of course I tried mon and cricket ( and tried == installed, configured and tried running for few months ), so I think i've got all main tools covered, and they don't fit the bill. ( for example - when monitoring services, the tools notices states up/down/lagged. Good. But why won't it save the data that it gathers and display this as graph? And archive the data so that one can analyze it. And please don't be browser-centric. Flashy web page should be of least importance, not the main feature of the project ( vide early days of big-brother/big-sister ) ) regards, -- Dariush Pietrzak, Key fingerprint = 40D0 9FFB 9939 7320 8294 05E0 BCC7 02C4 75CC 50D9 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 02:53:20PM +0100, Dariush Pietrzak wrote: nice.. but design behind whole mrtg/rrdtool makes them useless in many situations - for example, try comparing trends in two julys from different years.. you can't, can you.. ) Of course you can, as long as you set up your RRDs at the start to hold all of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. -- - mdz -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 02:53:20PM +0100, Dariush Pietrzak wrote: If anyone decides to start writing monitoring tool, I'd be happy to join the team. Packages for spong and rrdtool already exist. They might not do everything, but it looks to be a pretty stable base to start from, and there's already a plugin API for server, client, and network checks. I've already written one simple network plugin for checking remote SMB servers, and I'm planning on writing another to monitor FlexLM usage/downtime. http://spong.sf.net/ -- the main web page hasn't been updated in a while, but there is still active development. -- Mike Renfro / RD Engineer, Center for Manufacturing Research, 931 372-3601 / Tennessee Technological University -- [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
On Fri, 14 Feb 2003, Dariush Pietrzak wrote: Don't know all the tools u are talking about, but maybe BigBrother (http://bb4.com/) is what u are looking for? Ehm, netsaint,nagios seems way more mature. And I don't intend to replace one of those tools. I want one tool for monitoring. Or maybe two ( monit Can you run down the list of things you find way more mature in netsaint over Big Brother (and maybe vice versa)? I am curious to know - since you seem to have expert knowledge of all of these tools, if you make a case, I would probably switch. ( for example - when monitoring services, the tools notices states up/down/lagged. Good. But why won't it save the data that it gathers and display this as graph? And archive the data so that one can analyze it. Big Brother will keep a history of events and display it neatly. And please don't be browser-centric. I get an email when a service is down or slow. When I want to review the history of things, I don't mind a little colour and separation. A matter of taste and not anything else. Ognen -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
On Thu, Feb 13, 2003 at 04:18:56PM -0500, George Georgalis wrote: * a local watchdog shell script that is called by cron minutely and that - checks ps cax if every process is there else it restarts it I've seen services fail to work while they are still in the ps tree. Speaking from experience, I'd recommend the watchdog tries to use the service before it confirms it's working... This is a check for a process that's not there at all - checking the function of a service is normally done by netsaint. bye, -christian- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. Well, that's the idea behind rrd, and I don't like it. You don't overwrite your security logs, why would you like to overwrite this data? Actually I believe rrd is a wonderfull tool and a work of art, it's just it's not applicable to ANY situation and people seem to do that. Goes like this: what is some tool and plot graphs... Why it's mrtg/rrdtool. It's great. But there is no alternative. And there should be. -- Dariush Pietrzak, Key fingerprint = 40D0 9FFB 9939 7320 8294 05E0 BCC7 02C4 75CC 50D9 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
Not sure what problems you're having with Nagios but my office was originally using Big Brother which the previous admin regime had installed before being handed over to our department to manage. Our team found BB to be a complete and utter pain in the ass so we removed it and replaced it with Netsaint. Now that Nagios is out we're working to migrate our configuration from Netsaint - Nagios, as well I'm part of the Nagios Plugin development and working to make the plugins AF-independent as our office requires the ability to monitor IPv4 and IPv6 hosts and services... With escalation schemes, contact groups, service host dependencies, planned downtime/outages and configurable notification methods we have found Netsaint/Nagios to be great. We have far less false-positive outage alerts than with BigBrother which makes us pay more attention to the notifications when they are sent out. With BB we would procmail them to a folder and ignore them because there were always so many. As for there not being any DEB for Nagios, there are several Nagios DEBs in unstable (nagios-text, nagios-pgsql and nagios-mysql). Currently there is no stable release of the Nagios Plugins (latest release has been 1.3beta2) but the plugin API has not changed so the netsaint-plugins package still works with Nagios. Not sure what configuration/installation issues you're having but I haven't had anything not work with the default configuration and ours is now fairly highly customized... Jeremy On Thu, Feb 13, 2003 at 02:59:26PM +, gabe wrote: I would like to know what ppl think is the best package for monitor servers, at my last work place they were installing mon. In my new job they use Nagios, which I'm not to sure about due to the fact that installation / configuration goes wrong. Most importantly there's no deb package for Nagios which makes me not wanna use it in the first place. Any comments or thoughts welcomed -- Gabriel Granger +-+ | .~. | | /V\ L I N U X - Debian| | // \\The force is strong in this one | | /( )\ | | ^^-^^ | +-+ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] msg08693/pgp0.pgp Description: PGP signature
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 05:00:42PM +0100, Dariush Pietrzak wrote: It's great. But there is no alternative. And there should be. That's because there doesn't need to be an alternative. Rrdtool is a specialized application to fill a niche. Any old database will work in situation where you are willing to keep all your data forever. noah -- ___ | Web: http://web.morgul.net/~frodo/ | PGP Public Key: http://web.morgul.net/~frodo/mail.html msg08695/pgp0.pgp Description: PGP signature
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Re: machine monitoring packages
Dariush Pietrzak wrote: ( for example - when monitoring services, the tools notices states up/down/lagged. Good. But why won't it save the data that it gathers and display this as graph? And archive the data so that one can analyze it. nagios does this, if you configure it. There are also commercial packages that do this (sitescope) -- Glen Mehn [EMAIL PROTECTED] if you ever swallow the universe, remember to spit the dragon back out.xx. --swan -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 05:00:42PM +0100, Dariush Pietrzak wrote: Goes like this: what is some tool and plot graphs... Why it's mrtg/rrdtool. It's great. But there is no alternative. And there should be. What's wrong with gnuplot? This is getting so off-topic... Marcin -- Marcin Owsiany [EMAIL PROTECTED] http://marcin.owsiany.pl/ GnuPG: 1024D/60F41216 FE67 DA2D 0ACA FC5E 3F75 D6F6 3A0D 8AA0 60F4 1216 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 11:19:04AM -0500, George Georgalis wrote: On Fri, Feb 14, 2003 at 10:15:16AM -0500, Matt Zimmerman wrote: Of course you can, as long as you set up your RRDs at the start to hold all of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. RRDs are designed not to grow, hence the Round Robin they are not intended to archive historical data, but you could always save a png for the prior month at the first day of the month and compare the pictures later... You can also snapshot the RRDs so that you preserve all data (and easily plot data from multiple RRDs on the same graph), but this is not a natural fit for rrdtool. -- - mdz -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 05:00:42PM +0100, Dariush Pietrzak wrote: of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. Well, that's the idea behind rrd, and I don't like it. You don't overwrite your security logs, why would you like to overwrite this data? Most people do throw away their logs after a certain period of time, actually. And most people don't care about the value of a certain quantity at 3:05pm one day 2 years ago, as compared to 3:10pm the next day. They do care about the average, maximum, and minimum of that quantity for the day. That is why rrdtool summarizes data. There have been several discussions about using the rrdtool API to store data in an expanding database (for example, an RDBMS), but as far as I know nobody has actually done the work, meaning that nobody has needed it so badly and could not find an alternative. It's great. But there is no alternative. And there should be. If you feel there should be, then you should create one, or add what you need to an existing tool. -- - mdz -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
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Re: machine monitoring packages
Quoting Dariush Pietrzak [EMAIL PROTECTED]: of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. Well, that's the idea behind rrd, and I don't like it. You don't overwrite your security logs, why would you like to overwrite this data? Some people consider logs that grow without bounds undesirable. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: machine monitoring packages
Am Freitag, 14. Februar 2003 12:47 schrieb Thorsten Giese: Hello there. I have followed the recent discussion with all the flavours of the different tools. A question came to my mind immediatly: What is the difference between nagios and opennms? A second one: Can one of the tools also cope with sylog information? I have to set up a monitoring system on a university for applied siences in Germany this summer and any help would be greatly appreciated. -- Thank you Thorsten Giese Am Donnerstag, 13. Februar 2003 15:59 schrieb gabe: I would like to know what ppl think is the best package for monitor servers, at my last work place they were installing mon. In my new job they use Nagios, which I'm not to sure about due to the fact that installation / configuration goes wrong. Most importantly there's no deb package for Nagios which makes me not wanna use it in the first place. Any comments or thoughts welcomed -- Gabriel Granger +-+ | .~. | | /V\ L I N U X - Debian| | // \\The force is strong in this one | | /( )\ | | ^^-^^ | +-+ -- -- Viele Grüße Thorsten Giese
Re: machine monitoring packages
Hello, I believe there is a need for good monitoring tool, and none of existing tools qualify. As it stands now, I am using mix of different tools, quite similiar to each other... ie netsaint, mrtg, smokeping and monit. And add to that syslog with syslog monitoring tools, add ipsec for logging to single machine... It's a nightmare! And they still won't provide all the features i need ( i.e. - mrtg graphs are nice.. but design behind whole mrtg/rrdtool makes them useless in many situations - for example, try comparing trends in two julys from different years.. you can't, can you.. ) The task here is fairly simple, why do I need to set up so many different tools? If anyone decides to start writing monitoring tool, I'd be happy to join the team. -- Dariush Pietrzak, Who are we helping? - the girl. - Typical. Key fingerprint = 40D0 9FFB 9939 7320 8294 05E0 BCC7 02C4 75CC 50D9
Re: machine monitoring packages
Don't know all the tools u are talking about, but maybe BigBrother (http://bb4.com/) is what u are looking for? Philipp Hetzner Dariush Pietrzak wrote: Hello, I believe there is a need for good monitoring tool, and none of existing tools qualify. As it stands now, I am using mix of different tools, quite similiar to each other... ie netsaint, mrtg, smokeping and monit. And add to that syslog with syslog monitoring tools, add ipsec for logging to single machine... It's a nightmare! And they still won't provide all the features i need ( i.e. - mrtg graphs are nice.. but design behind whole mrtg/rrdtool makes them useless in many situations - for example, try comparing trends in two julys from different years.. you can't, can you.. ) The task here is fairly simple, why do I need to set up so many different tools? If anyone decides to start writing monitoring tool, I'd be happy to join the team.
Re: machine monitoring packages
Don't know all the tools u are talking about, but maybe BigBrother (http://bb4.com/) is what u are looking for? Ehm, netsaint,nagios seems way more mature. And I don't intend to replace one of those tools. I want one tool for monitoring. Or maybe two ( monit needs to run as root, wouldn't be to wise to run all monitoring this way ). Of course I tried mon and cricket ( and tried == installed, configured and tried running for few months ), so I think i've got all main tools covered, and they don't fit the bill. ( for example - when monitoring services, the tools notices states up/down/lagged. Good. But why won't it save the data that it gathers and display this as graph? And archive the data so that one can analyze it. And please don't be browser-centric. Flashy web page should be of least importance, not the main feature of the project ( vide early days of big-brother/big-sister ) ) regards, -- Dariush Pietrzak, Key fingerprint = 40D0 9FFB 9939 7320 8294 05E0 BCC7 02C4 75CC 50D9
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 02:53:20PM +0100, Dariush Pietrzak wrote: nice.. but design behind whole mrtg/rrdtool makes them useless in many situations - for example, try comparing trends in two julys from different years.. you can't, can you.. ) Of course you can, as long as you set up your RRDs at the start to hold all of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. -- - mdz
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 02:53:20PM +0100, Dariush Pietrzak wrote: If anyone decides to start writing monitoring tool, I'd be happy to join the team. Packages for spong and rrdtool already exist. They might not do everything, but it looks to be a pretty stable base to start from, and there's already a plugin API for server, client, and network checks. I've already written one simple network plugin for checking remote SMB servers, and I'm planning on writing another to monitor FlexLM usage/downtime. http://spong.sf.net/ -- the main web page hasn't been updated in a while, but there is still active development. -- Mike Renfro / RD Engineer, Center for Manufacturing Research, 931 372-3601 / Tennessee Technological University -- [EMAIL PROTECTED]
Re: machine monitoring packages
On Thu, Feb 13, 2003 at 04:18:56PM -0500, George Georgalis wrote: * a local watchdog shell script that is called by cron minutely and that - checks ps cax if every process is there else it restarts it I've seen services fail to work while they are still in the ps tree. Speaking from experience, I'd recommend the watchdog tries to use the service before it confirms it's working... This is a check for a process that's not there at all - checking the function of a service is normally done by netsaint. bye, -christian-
Re: machine monitoring packages
On Fri, 14 Feb 2003, Dariush Pietrzak wrote: Don't know all the tools u are talking about, but maybe BigBrother (http://bb4.com/) is what u are looking for? Ehm, netsaint,nagios seems way more mature. And I don't intend to replace one of those tools. I want one tool for monitoring. Or maybe two ( monit Can you run down the list of things you find way more mature in netsaint over Big Brother (and maybe vice versa)? I am curious to know - since you seem to have expert knowledge of all of these tools, if you make a case, I would probably switch. ( for example - when monitoring services, the tools notices states up/down/lagged. Good. But why won't it save the data that it gathers and display this as graph? And archive the data so that one can analyze it. Big Brother will keep a history of events and display it neatly. And please don't be browser-centric. I get an email when a service is down or slow. When I want to review the history of things, I don't mind a little colour and separation. A matter of taste and not anything else. Ognen
Re: machine monitoring packages
of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. Well, that's the idea behind rrd, and I don't like it. You don't overwrite your security logs, why would you like to overwrite this data? Actually I believe rrd is a wonderfull tool and a work of art, it's just it's not applicable to ANY situation and people seem to do that. Goes like this: what is some tool and plot graphs... Why it's mrtg/rrdtool. It's great. But there is no alternative. And there should be. -- Dariush Pietrzak, Key fingerprint = 40D0 9FFB 9939 7320 8294 05E0 BCC7 02C4 75CC 50D9
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 10:15:16AM -0500, Matt Zimmerman wrote: On Fri, Feb 14, 2003 at 02:53:20PM +0100, Dariush Pietrzak wrote: nice.. but design behind whole mrtg/rrdtool makes them useless in many situations - for example, try comparing trends in two julys from different years.. you can't, can you.. ) Of course you can, as long as you set up your RRDs at the start to hold all of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. RRDs are designed not to grow, hence the Round Robin they are not intended to archive historical data, but you could always save a png for the prior month at the first day of the month and compare the pictures later... // George -- GEORGE GEORGALIS, System Admin/Architectcell: 347-451-8229 Security Services, Web, Mail,mailto:[EMAIL PROTECTED] Multimedia, DB, DNS and Metrics. http://www.galis.org/george
Re: machine monitoring packages
Not sure what problems you're having with Nagios but my office was originally using Big Brother which the previous admin regime had installed before being handed over to our department to manage. Our team found BB to be a complete and utter pain in the ass so we removed it and replaced it with Netsaint. Now that Nagios is out we're working to migrate our configuration from Netsaint - Nagios, as well I'm part of the Nagios Plugin development and working to make the plugins AF-independent as our office requires the ability to monitor IPv4 and IPv6 hosts and services... With escalation schemes, contact groups, service host dependencies, planned downtime/outages and configurable notification methods we have found Netsaint/Nagios to be great. We have far less false-positive outage alerts than with BigBrother which makes us pay more attention to the notifications when they are sent out. With BB we would procmail them to a folder and ignore them because there were always so many. As for there not being any DEB for Nagios, there are several Nagios DEBs in unstable (nagios-text, nagios-pgsql and nagios-mysql). Currently there is no stable release of the Nagios Plugins (latest release has been 1.3beta2) but the plugin API has not changed so the netsaint-plugins package still works with Nagios. Not sure what configuration/installation issues you're having but I haven't had anything not work with the default configuration and ours is now fairly highly customized... Jeremy On Thu, Feb 13, 2003 at 02:59:26PM +, gabe wrote: I would like to know what ppl think is the best package for monitor servers, at my last work place they were installing mon. In my new job they use Nagios, which I'm not to sure about due to the fact that installation / configuration goes wrong. Most importantly there's no deb package for Nagios which makes me not wanna use it in the first place. Any comments or thoughts welcomed -- Gabriel Granger +-+ | .~. | | /V\ L I N U X - Debian| | // \\The force is strong in this one | | /( )\ | | ^^-^^ | +-+ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] pgpqzywV85ysv.pgp Description: PGP signature
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 05:00:42PM +0100, Dariush Pietrzak wrote: It's great. But there is no alternative. And there should be. That's because there doesn't need to be an alternative. Rrdtool is a specialized application to fill a niche. Any old database will work in situation where you are willing to keep all your data forever. noah -- ___ | Web: http://web.morgul.net/~frodo/ | PGP Public Key: http://web.morgul.net/~frodo/mail.html pgpZJ6WMB7inx.pgp Description: PGP signature
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Re: machine monitoring packages
On Fri, Feb 14, 2003 at 05:00:42PM +0100, Dariush Pietrzak wrote: Goes like this: what is some tool and plot graphs... Why it's mrtg/rrdtool. It's great. But there is no alternative. And there should be. What's wrong with gnuplot? This is getting so off-topic... Marcin -- Marcin Owsiany [EMAIL PROTECTED] http://marcin.owsiany.pl/ GnuPG: 1024D/60F41216 FE67 DA2D 0ACA FC5E 3F75 D6F6 3A0D 8AA0 60F4 1216
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 11:19:04AM -0500, George Georgalis wrote: On Fri, Feb 14, 2003 at 10:15:16AM -0500, Matt Zimmerman wrote: Of course you can, as long as you set up your RRDs at the start to hold all of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. RRDs are designed not to grow, hence the Round Robin they are not intended to archive historical data, but you could always save a png for the prior month at the first day of the month and compare the pictures later... You can also snapshot the RRDs so that you preserve all data (and easily plot data from multiple RRDs on the same graph), but this is not a natural fit for rrdtool. -- - mdz
Re: machine monitoring packages
On Fri, Feb 14, 2003 at 05:00:42PM +0100, Dariush Pietrzak wrote: of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. Well, that's the idea behind rrd, and I don't like it. You don't overwrite your security logs, why would you like to overwrite this data? Most people do throw away their logs after a certain period of time, actually. And most people don't care about the value of a certain quantity at 3:05pm one day 2 years ago, as compared to 3:10pm the next day. They do care about the average, maximum, and minimum of that quantity for the day. That is why rrdtool summarizes data. There have been several discussions about using the rrdtool API to store data in an expanding database (for example, an RDBMS), but as far as I know nobody has actually done the work, meaning that nobody has needed it so badly and could not find an alternative. It's great. But there is no alternative. And there should be. If you feel there should be, then you should create one, or add what you need to an existing tool. -- - mdz
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Re: machine monitoring packages
Quoting Dariush Pietrzak [EMAIL PROTECTED]: of the data that you will want. RRDs do not expand once they are created, so once it wraps and starts to overwrite old data, it is lost. Well, that's the idea behind rrd, and I don't like it. You don't overwrite your security logs, why would you like to overwrite this data? Some people consider logs that grow without bounds undesirable.
